A. Characterize the roots of the following quadratic equations using the discriminant. 1. x² + 4x + 3 = 0 2. x2 - 5x + 4 = 0 3. x² + 7 = 0 4. 4x² - 4x + 1 = 0 5. 2x2 + 6x + 3 = 0

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